HP OMNIBER 718 37718A User manual

HP 37718A
OmniBER 718
User’s Guide
DSn/SONET
Operation

Hewlett-Packard Limited
Telecommunications Networks Test Division
South Queensferry
West Lothian, Scotland EH30 9TG
Copyright Hewlett-
Packard Ltd.1998
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HP Part No.
37718-90022
First edition,09/98
Second Edition, 12/98
Printed in U.K.
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User’s Guide DSn/SONET Operation
HP 37718A
OmniBER 718

iv
This book tells you how to select the features that you want to use for your test.
The selections available are presented in the following groups:
• Transmit and receive interfaces
• Testfeatures,forexample,theaddition oferrors andalarmstothetest
signal
• Measurements including test timing
• Storing, logging and printing results with general printer information
• Using instrument and disk storage
• Using the “Other” features.
The selections available will depend on the options fitted to your
instrument. The examples given in this book cover all options and
therefore may include selections which are not available on your
instrument.
About This Book

Contents
v
1 Setting the Interfaces
Setting DSn Transmit Interface 2
Setting SONET Transmit Interface 4
Setting Jitter Transmit Interface 7
Setting Wander Transmit Interface 9
Setting SONET THRU Mode 11
Using Smart Test 13
Setting DSn Receive Interface 15
Setting SONET Receive Interface 17
Setting Jitter Receive Interface 18
Setting Extended Jitter Receive Interface 19
Setting Wander Receive Interface 20
2 Selecting Test Features
Using Transmit Overhead Setup 22
Using Receive Overhead Monitor 24
Setting Overhead Trace Messages 26
Generating Overhead Sequences 27
Using Receive Overhead Capture 29
Adding Frequency Offset to SONET Signal 31
Adding Frequency Offset to the DSn Signal 33
Setting up Signaling Bits 34
Setting Transmit Structured Payload/Test Signal 37
Setting Receive Structured Payload/Test Signal 39
Setting Transmit N x 64 kb/s/N x 56 kb/s
Structured Payload/Test Signal 40
Setting Receive N x 64 kb/s/N x 56 kb/s
Structured Payload/Test Signal 42

vi
Contents
Inserting an External DSn Payload/Test Signal 43
Dropping an External Payload/Test Signal 46
Adding Errors & Alarms at the SONET Interface 49
Adding Errors & Alarms to the DSn Interface/DSn Payload 50
Using FEAC Codes 51
Setting DSn Spare Bits 53
Adding Pointer Adjustments 54
Using Pointer Graph Test Function 61
Stressing Optical Clock Recovery Circuits 63
Generating Automatic Protection Switch Messages 64
Inserting & Dropping Data Communications Channel 65
3 Making Measurements
Using Overhead BER Test Function 68
Test Timing 69
Making SONET Analysis Measurements 70
Making DSn Analysis Measurements 71
Measuring Frequency 72
Measuring Optical Power 73
Measuring Round Trip Delay 74
Monitoring Signaling Bits 76
Measuring Service Disruption Time 77
Performing a SONET Tributary Scan 80
Performing an SONET Alarm Scan 82
Performing a DSn Alarm Scan 83
Measuring Jitter 84
Measuring Extended Jitter 86
Measuring Wander 87
Measuring Jitter Tolerance 89

Contents
vii
Measuring Jitter Transfer 92
4 Storing, Logging and Printing
Saving Graphics Results to Instrument Store 98
Recalling Stored Graph Results 99
Viewing the Bar Graph Display 101
Viewing the Graphics Error and Alarm Summaries 103
Logging Graph Displays 105
Logging Results 107
Logging on Demand 110
Logging Jitter Tolerance Results 112
Logging Jitter Transfer Results 114
Logging Results to Parallel (Centronics) Printer 116
Logging Results to HP-IB Printer 117
Logging Results to Internal Printer 118
Logging Results to RS-232-C Printer 119
Printing Results from Disk 120
Connecting an HP 850C DeskJet Printer to a Parallel Port 121
Changing Internal Printer Paper 122
Cleaning Internal Printer Print Head 125
5 Using Instrument and Disk Storage
Storing Configurations in Instrument Store 128
Titling Configuration in Instrument Store 129
Recalling Configurations from Instrument Store 130
Formatting a Disk 131

viii
Contents
Labeling a Disk 132
Managing Files and Directories on Disk 133
Saving Graphics Results to Disk 140
Saving Data Logging to Disk 142
Saving Configurations to Disk 143
Recalling Configuration from Disk 144
Recalling Graphics Results from Disk 145
Copying Configuration from Instrument Store to Disk 146
Copying Configuration from Disk to Instrument Store 148
Copying Graphics Results from Instrument Store to Disk 150
6 Selecting and Using "Other" Features
Coupling Transmit and Receive Settings 154
Setting Time & Date 155
Enabling Keyboard Lock 156
Enabling Beep on Received Error 157
Suspending Test on Signal Loss 158
Setting Error Threshold Indication 159
Setting Screen Brightness and Color 160
Dumping Display to Disk 161
Running Self Test 163

Contents
ix
7 STS-1 SPE Background Patterns
8 ETSI/ANSI Terminology
ETSI/ANSI Conversion and Equivalent Terms 170

x
Contents

1
1Setting the Interfaces
This chapter tells you how to set the instrument
interfaces to match the network being tested.

2
Setting the Interfaces
Setting DSn Transmit Interface
Description DSn transmit interface settings should match network equipment
settings of Rate, Termination and Line Code and determine the Payload
to be tested.
TIP: To set the Transmitter and Receiver to the same interface settings
choose .
HOW TO: 1Choose the required SIGNAL rate.
Rates of DS1, DS3, 2 Mb/s and 34 Mb/s are available.
2If you have chosen 2 Mb/s as the SIGNAL rate, choose the required
CLOCK SYNC source - internally generated or recovered from the
received DSn signal.
If Jitter, Option 204, 205 or 206, is fitted and SIGNAL is chosen
a choice is added to the menu. This allows you to choose the
synchronization source for the 2 Mb/s reference. The synchronization
source is supplied from the SONET Clock module. It can be internally
generated, derived from an external clock or recovered from the
SONET received signal.
OTHER SETTINGS CONTROL COUPLED
2 Mb/s
2M REF

3
Setting the Interfaces
Setting DSn Transmit Interface
3If DS1 or DS3 is chosen, choose the required OUTPUT LEVEL.
4If you have chosen 2 Mb/s as the SIGNAL rate, choose the required
TERMINATION. (At all other signal rates the impedance is fixed).
5If you have chosen 2 Mb/s or DS1 as the SIGNAL rate, choose the
required LINE CODE. (At 34 Mb/s and DS3 coding is fixed).
6If required, choose the FREQUENCY OFFSET value.
See “Adding Frequency Offset to the DSn Signal” page 33.
7Choose the required PAYLOAD TYPE.
If is required must be chosen.
If is chosen the DSn test signal must be set up. See
“Setting Transmit Structured Payload/Test Signal” page 37.
If you have chosen 2 Mb/s, DS1 or DS3 as the DSn signal rate, the
Framed choice is expanded to provide a menu of framing types.
8Choose the PATTERN type and the PRBS POLARITY.
STRUCTURED FRAMED
STRUCTURED

4
Setting the Interfaces
Setting SONET Transmit Interface
Setting SONET Transmit Interface
Description SONET transmit interface settings should match the network
equipment settings of Rate, Wavelength and Mapping, determine the
payload to be tested and set background conditions to prevent alarms
while testing.
TIP: If you wish to set the HP 37718A transmitter and receiver to the same
interface settings choose .
HOW TO:1Make your choice of SIGNAL rate.
If Option 106, Dual Wavelength optical module, is fitted and an optical
rate is chosen, choose the required wavelength (1550) or (1310).
If STS-1 is chosen, choose the required interface level.
Choose unless isrequired.If is
chosen, see "Setting SONET THRU Mode " page 11.
2Make your choice of CLOCK synchronization source. The RECEIVE
clock synchronization choice depends on the SONET Receive Interface
choice. allows a choice of MTS, BITS or 10 MHz clocks.
3If required choose the FREQUENCY OFFSET value. See “Adding
Frequency Offset to SONET Signal” page 31.
OTHER SETTINGS CONTROL COUPLED
INTERNAL THRU MODE THRU MODE
EXTERNAL

5
Setting the Interfaces
Setting SONET Transmit Interface
4Choose FOREGROUND , BACKGROUND
MAPPING and type of payload.
Mapping may be selected from a pictorial display by moving the cursor to
MAPPING and pressing .
Use and to move between STS Layer choice, VT Layer choice and
Payload Layer choice. Use and to choose the mapping.
Use to confirm your choice and return to the
display.
5If VT-6 mapping is chosen, VT CONCATENATION selection is
enabled, choose or the tributary at which the concatenation
begins, VT6-2C through VT6-6C.
The BACKGROUND, PATTERN IN OTHER VT-6’s is fixed at
NUMBERED, that is, each VT-6 contains a unique number to allow
identification in case of routing problems.
6If required, choose DS1/2M/34M/DS3 OFFSET value. See “Adding
Frequency Offset to SONET Signal” page 31
7If FULL SPE, VT-6, VT-2 or VT-1.5 mapping is chosen, choose the test
tributary CHANNEL, including the STS-3 for an OC-12/OC-48 signal.
8Choose the payload framing under PAYLOAD TYPE or VT PAYLOAD.
If is required must be chosen.
If is chosen, the Payload test signal must be set up. See
“Setting Transmit Structured Payload/Test Signal” page 37.
If is chosen, see “Inserting an External DSn Payload/Test
Signal” page 43.
F/G MAPPING
B/G MAPPING
SET
SET SONET
MAIN SETTINGS
OFF
STRUCTURED FRAMED
STRUCTURED
INSERT

6
Setting the Interfaces
Setting SONET Transmit Interface
If you have chosen 2 Mb/s, DS1 or DS3 under Mapping, the Framed
choice is expanded to provide a menu of framing types.
9Choose the PATTERN type and PRBS polarity.
10 Choose the mapping required in the background (non-test) STS’s.
11 If VT mapping is chosen for the test STS, choose the PATTERN IN
OTHER VT’s.

7
Setting the Interfaces
Setting Jitter Transmit Interface
Setting Jitter Transmit Interface
Description: You can add jitter to the transmitted DSn or SONET signal at 2 Mb/s,
34 Mb/s, STS-3, OC-3, OC-12, and OC-48. You can source the jitter
modulation internally or from an external source.
HOW TO: 1If you are adding jitter to the DSn signal, set up the DSn transmit
interface. See Chapter “Setting DSn Transmit Interface”.
2If you are adding jitter to the SONET signal, set up the SONET
transmit interface. See “Setting SONET Transmit Interface” page 4.
3Choose JITTER/WANDER .
If you wish to add wander to the DSn or SONET signal, See “Setting
Wander Transmit Interface” page 9.
4Choose JITTER .
If you wish to perform a Jitter Tolerance measurement, choose
. See “Measuring Jitter Tolerance” page 89.
If you wish to perform a Jitter Transfer measurement choose
. See “Measuring Jitter Transfer” page 92.
JITTER
ON
AUTO TOLERANCE
TRANSFER FUNCTION

8
Setting the Interfaces
Setting Jitter Transmit Interface
5Choose the modulation source.
If adding jitter to the DSn signal and is chosen, connect
the external source to the MOD IN port of the DSn Jitter TX module.
Up to 10 UI of external jitter modulation can be added at the MOD IN
port.
If adding jitter to the SDH signal and is chosen, connect
the external source to the MOD IN port of the SONET Clock module.
Up to 20 UI of external jitter modulation can be added at the MOD IN
port.
6Choose the JITTER MASK setting required.
You can choose the jitter range, jitter modulating frequency and jitter
amplitude if is chosen.
If you choose , the HP 37718A will "sweep" through the ITU-T
jitter mask (G.823 for DSn, G.958, G.825 or G.253 for SONET)
adjusting the jitter amplitude according to the jitter frequency.
If you choose , you can choose the "spot" jitter frequency. The
jitter amplitude is adjusted and controlled according to your jitter
frequency choice.
TIP: If, when using the SWEPT MASK capability, a problem occurs around a
certain frequency, this may require closer examination. Stop the sweep
at that point by choosing . You can then control the "spot" jitter
frequency to make closer examination of the problem.
EXTERNAL
EXTERNAL
OFF
SWEPT
SPOT
SPOT

9
Setting the Interfaces
Setting Wander Transmit Interface
Setting Wander Transmit Interface
Description: You can add Wander to the 2 Mb/s DSn signal and the STS-3, OC-3,
OC-12 or OC-48 SONET signal.
HOW TO: DSn Wander (2 Mb/s)
1ConnectREFOUT on the SONET Clock module toREFIN on the DSn
Jitter TX module (this provides the Wander Reference).
2Setup the DSn transmit interface,chooseCLOCK SYNC and
select the SOURCE required from the menu. See “Setting DSn
Transmit Interface” page 2.
3Choose JITTER/WANDER .
Ifyou wishto add jitterto theDSnsignal, See“Setting Jitter Transmit
Interface” page 7.
4Choose WANDER .
5Choose the modulation source.
If is chosen, connect the external source to the MOD IN
port of the DSn Jitter TX module. Up to 10 UI of external wander
modulation can be added.
2M REF
WANDER
ON
EXTERNAL

10
Setting the Interfaces
Setting Wander Transmit Interface
6Choose the WANDER MASK setting required.
You can choose the wander modulating frequency and wander
amplitude if is chosen.
If you choose , you can choose the "spot" wander frequency. The
wanderamplitudeisadjustedand controlledaccording toyourwander
frequency choice.
SONET Wander (STS-3, OC-3, OC-12, OC-48)
7Set up the SONET transmit interface. See “Setting SONET Transmit
Interface” page 4.
8Choose JITTER/WANDER .
If you wish to add jitter to the SONET signal, see "Setting Jitter
Transmit Interface " page 7.
9Choose WANDER .
10 Choose the WANDER MASK setting required.
You can choose the wander modulating frequency and wander
amplitude if is chosen.
If you choose , you can choose the "spot" wander frequency. The
wanderamplitudeisadjustedand controlledaccording toyourwander
frequency choice.
OFF
SPOT
WANDER
ON
OFF
SPOT